Fix CI Python 3.6 failing due to .ipynb (onnx#3367)

* fix ipython version

Signed-off-by: Chun-Wei Chen <[email protected]>

* use 7.16.1 instead

Signed-off-by: Chun-Wei Chen <[email protected]>

.azure-pipelines/Linux-CI.yml

@@ -102,7 +102,8 @@ jobs:
  # onnx python api tests
  # pytest 6.0 made deprecation warnings fail by default, pinning pytest to 5.4.3.
  # TODO replace deprecated function with the suggested one. https://docs.pytest.org/en/stable/deprecations.html#id5
- python -m pip install --quiet pytest==5.4.3 nbval
+ # TODO Remove fixed ipython 7.16.1 once ONNX remove Python 3.6
+ python -m pip install --quiet pytest==5.4.3 nbval ipython==7.16.1
 
  pytest
  if [ $? -ne 0 ]; then

.azure-pipelines/MacOS-CI.yml

@@ -82,7 +82,8 @@ jobs:
  # onnx python api tests
  # pytest 6.0 made deprecation warnings fail by default, pinning pytest to 5.4.3.
  # TODO replace deprecated function with the suggested one. https://docs.pytest.org/en/stable/deprecations.html#id5
- pip install --quiet pytest==5.4.3 nbval
+ # TODO Remove fixed ipython 7.16.1 once ONNX has removed Python 3.6
+ pip install --quiet pytest==5.4.3 nbval ipython==7.16.1
 
  pytest
  if [ $? -ne 0 ]; then

.azure-pipelines/Windows-CI.yml

@@ -43,7 +43,8 @@ jobs:
  python -m pip install --upgrade pip
  # pytest 6.0 made deprecation warnings fail by default, pinning pytest to 5.4.3.
  # TODO replace deprecated function with the suggested one. https://docs.pytest.org/en/stable/deprecations.html#id5
- python -m pip install --quiet pytest==5.4.3 nbval numpy
+ # TODO Remove fixed ipython 7.16.1 once ONNX has removed Python 3.6
+ python -m pip install --quiet pytest==5.4.3 nbval numpy ipython==7.16.1
 
  git submodule update --init --recursive
  set ONNX_BUILD_TESTS=1